Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1979-01-31
1980-12-02
Reynolds, B. A.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
307 38, 307 37, 219494, 219486, 219483, H05B 102
Patent
active
042373697
ABSTRACT:
Temperature responsive power supply apparatus for electrical resistance heating, e.g. for weld stress relief, has a power supply transformer comprising first and second secondary windings in series with one another and first, second and third conductors for connecting the secondary windings to heating elements. A pair of temperature sensors provide temperature signals corresponding to the temperatures of heated zones heated by the apparatus, and a pair of control units responsive to the temperature signals control the current flow through the conductors. A switch enables one or both control units to regulate saturable reactors or the like in series with the conductors, whereby the control unit can regulate two respective heating circuits each including one of the secondary windings or one of the control units can regulate a heating circuit including one or both of the secondary windings. The apparatus provided improved versatility for heating one or more large or small pipe welds.
REFERENCES:
patent: 3247361 (1966-04-01), Woodley
patent: 3432643 (1969-03-01), Finnegan et al.
patent: 3851148 (1974-11-01), Schoner et al.
patent: 4066867 (1978-01-01), Bechtel
Paschall M.
Reynolds B. A.
LandOfFree
Wild stress relief power supply apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wild stress relief power supply apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wild stress relief power supply apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2285661